JPS5922766Y2 - Double sheathed cable bulling eye attachment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved device for attaching a pulling eye to a double-sheathed cable.

Conventionally, when attaching a pooling eye to a single-sheathed cable, the core conductor of the cable is connected to the eye body of the pooling eye, and the sheath of the cable is crimped and connected by the cap of the pooling eye.

On the other hand, recently, cables having double sheaths such as steel strips and aluminum corrugated tube jackets have been developed to prevent cables from being affected by external influences.

In this type of double sheathed cable, the weight of the entire cable increases and the installation tension increases, so the attachment portion of the pulling eye is required to have a high tensile strength.

When attaching a conventionally structured pulling eye to such a double-sheathed cable, the connection is made by tightening the internal sheath of the cable or the cap of the pulling eye as in the past, but the external sheath of the cable is connected to the cap of the pulling eye. It was fixed with a heat-shrinkable tube that was placed across the outer sheath and was heat-shrinked.

However, such a mounting structure has the drawback that the mechanical strength of the connection between the double sheathed cable, which has a large weight, and the pulling eye is insufficient, and the cap may come off from the sheath, resulting in poor airtightness.

An object of the present invention is to provide a device for attaching a pulling eye to a double sheathed cable, which allows the pulling eye to be connected to the double sheath with great mechanical strength, thus maintaining good airtightness. be.

An embodiment of the present invention will be described in detail with reference to the drawings. The drawings show a double sheath cable pulling eye attachment device 10 according to the present invention, in which a double sheath cable 12 has a core conductor 14, an inner sheath 16 and The outer sheath 18 is stripped.

In the illustrated embodiment, the inner sheath 16 is applied over the corrugated aluminum pipe 15 and the outer sheath 18 is applied over the steel strip 17.

The pulling eye 20 is a plug 2 having an eye nut 22.
4 and a cap 30 secured to the eye body by a lock nut 28.

The core conductor 14 of the double sheathed cable 12 is connected to the eye body 26.
is compressed and connected.

The cap 30 of the pooling eye 20 is placed over the inner sheath 16 exposed by stripping the steps, and is annularly crimped and connected to the inner sheath 16 at a plurality of locations as indicated by reference numeral 30a.

A metal sleeve 32 is welded to the inner end of the cap 30.
The metal snub is placed over the outer sheath 18 and is annularly crimped and connected to the outer sheath at a plurality of locations as indicated by the reference numeral 32a.

According to the present invention, as described above, the cap of the pulling eye is crimped and connected to the inner sheath of the cable, and the metal sleeve welded to this cap is crimped and connected to the outer sheath of the cable, so that it is not attached to the cap. Since the tension is shared between the inner and outer sheaths, the mechanical strength is high, so the airtightness is not broken, and the conventional single-sheath pulling eye can be used, making it economical.

[Brief explanation of the drawing]

The drawing is a longitudinally sectional side view of a main part of a pulling eye attachment device for a double sheathed cable according to the present invention. 10...Double sheath cable pulling eye attachment device, 12...Double sheath cable, 14
... Core conductor, 16 ... Inner sheath,
18... External sheath, 20... Pulling eye, 26... Eye body, 30...
・Cap, 30 a...Clinching part, 32...
...Metal sleeve, 32a...Clinching part.

Claims (1)

[Scope of utility model registration request] A pulling eye attachment device for a double sheath cable that connects a cap of a pooling eye having an eye body to which a core conductor of a double sheath cable having an inner sheath and an outer sheath is connected to a sheath of the double sheath cable, The inner sheath and outer sheath of the double sheath cable are separated, the cap of the pulling eye is crimped to the inner sheath, and the metal sleeve welded to the cap is crimped to the outer sheath. A pulling eye attachment device for a double sheathed cable, characterized by: